staging: iio: gyro: new driver for ADIS16060 digital output gyros

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/iio/gyro/Kconfig

@@ -3,6 +3,13 @@
 #
 comment "Digital gyroscope sensors"
 
+config ADIS16060
+	tristate "Analog Devices ADIS16060 Yaw Rate Gyroscope with SPI driver"
+	depends on SPI
+	help
+	  Say yes here to build support for Analog Devices adis16060 wide bandwidth
+	  yaw rate gyroscope with SPI.
+
 config ADIS16260
 	tristate "Analog Devices ADIS16260 ADIS16265 Digital Gyroscope Sensor SPI driver"
 	depends on SPI

drivers/staging/iio/gyro/Makefile

@@ -2,6 +2,9 @@
 # Makefile for digital gyroscope sensor drivers
 #
 
+adis16060-y             := adis16060_core.o
+obj-$(CONFIG_ADIS16060) += adis16060.o
+
 adis16260-y             := adis16260_core.o
 adis16260-$(CONFIG_IIO_RING_BUFFER) += adis16260_ring.o adis16260_trigger.o
 obj-$(CONFIG_ADIS16260) += adis16260.o

drivers/staging/iio/gyro/adis16060.h

@@ -0,0 +1,101 @@
+#ifndef SPI_ADIS16060_H_
+#define SPI_ADIS16060_H_
+
+#define ADIS16060_GYRO       0x20 /* Measure Angular Rate (Gyro) */
+#define ADIS16060_SUPPLY_OUT 0x10 /* Measure Temperature */
+#define ADIS16060_AIN2       0x80 /* Measure AIN2 */
+#define ADIS16060_AIN1       0x40 /* Measure AIN1 */
+#define ADIS16060_TEMP_OUT   0x22 /* Set Positive Self-Test and Output for Angular Rate */
+#define ADIS16060_ANGL_OUT   0x21 /* Set Negative Self-Test and Output for Angular Rate */
+
+#define ADIS16060_MAX_TX     3
+#define ADIS16060_MAX_RX     3
+
+/**
+ * struct adis16060_state - device instance specific data
+ * @us_w:			actual spi_device to write data
+ * @work_trigger_to_ring: bh for triggered event handling
+ * @inter:		used to check if new interrupt has been triggered
+ * @last_timestamp:	passing timestamp from th to bh of interrupt handler
+ * @indio_dev:		industrial I/O device structure
+ * @trig:		data ready trigger registered with iio
+ * @tx:			transmit buffer
+ * @rx:			recieve buffer
+ * @buf_lock:		mutex to protect tx and rx
+ **/
+struct adis16060_state {
+	struct spi_device		*us_w;
+	struct spi_device		*us_r;
+	struct work_struct		work_trigger_to_ring;
+	s64				last_timestamp;
+	struct iio_dev			*indio_dev;
+	struct iio_trigger		*trig;
+	u8				*tx;
+	u8				*rx;
+	struct mutex			buf_lock;
+};
+
+#if defined(CONFIG_IIO_RING_BUFFER) && defined(THIS_HAS_RING_BUFFER_SUPPORT)
+/* At the moment triggers are only used for ring buffer
+ * filling. This may change!
+ */
+
+enum adis16060_scan {
+	ADIS16060_SCAN_GYRO,
+	ADIS16060_SCAN_TEMP,
+	ADIS16060_SCAN_ADC_1,
+	ADIS16060_SCAN_ADC_2,
+};
+
+void adis16060_remove_trigger(struct iio_dev *indio_dev);
+int adis16060_probe_trigger(struct iio_dev *indio_dev);
+
+ssize_t adis16060_read_data_from_ring(struct device *dev,
+				      struct device_attribute *attr,
+				      char *buf);
+
+
+int adis16060_configure_ring(struct iio_dev *indio_dev);
+void adis16060_unconfigure_ring(struct iio_dev *indio_dev);
+
+int adis16060_initialize_ring(struct iio_ring_buffer *ring);
+void adis16060_uninitialize_ring(struct iio_ring_buffer *ring);
+#else /* CONFIG_IIO_RING_BUFFER */
+
+static inline void adis16060_remove_trigger(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16060_probe_trigger(struct iio_dev *indio_dev)
+{
+	return 0;
+}
+
+static inline ssize_t
+adis16060_read_data_from_ring(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
+{
+	return 0;
+}
+
+static int adis16060_configure_ring(struct iio_dev *indio_dev)
+{
+	return 0;
+}
+
+static inline void adis16060_unconfigure_ring(struct iio_dev *indio_dev)
+{
+}
+
+static inline int adis16060_initialize_ring(struct iio_ring_buffer *ring)
+{
+	return 0;
+}
+
+static inline void adis16060_uninitialize_ring(struct iio_ring_buffer *ring)
+{
+}
+
+#endif /* CONFIG_IIO_RING_BUFFER */
+#endif /* SPI_ADIS16060_H_ */